Tang Haijun1, Liu Yun2, Zhan Xinli1, Xiao Zengming1. 1. Department of Spine and Osteopathy Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, China. 2. Department of Spine and Osteopathy Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, China. Electronic address: 275207660@qq.com.